Heat dissipating device for refrigerating apparatus



Oct. 25, 1932.

H. B. HULL HEAT DISSIPATING DEVICE FOR REFRIGERATING APPARATUS OriginalFiled Oct. 31, 1928 June/14ml h d! Patented Oct. 25, '1932 UNITEDSTATES.

PATENT OFFICE HARRY B. HULL, DAYTON, OHIO, ASSIGNOB TO FBIGIDAIBECORPORATION, 01 DAYTON, OHIO, A CORPORATION OF DELAWARE HEAT DISSIIATINGDEVICE FOR REFBIGEBATING AIPABATUS Application filed October 81, 1928,Serial No. 816,258. Renewed June 4, 1982.

This invention relates to refrigerating apparatus particularly tocompressors and driving means therefor.

One of the objects of the invention is to 5 provide an improved meansfor reducing the noise incident to the operation of apparatus of thistype.

More specifically it is an object of the invention to inclose the noisyparts of a refrigerating apparatu's'in a sound absorbing housing and toprovide an improved means for dissipating the heat generated within thehousing.

Another object of the invention is to provide sound absorbing meansof acharacter indicated which is readily removable from the refrigeratingapparatus to permit inspection and adjustment.

More specifically it is an object of the invention to rovide a heattransmitting member including a quantity of volatile liquid forconducting the heat from within the housin to the outside atmosphere.

Anot erobject of theinvention is to provide improved means for coolingthe com-:

pres'sor in arrangements of the character indicated.

Another object of the invention is to provide a sound absorbing ousingfor inclosing 80 the noisy parts of a re rigeratm apparatus and exposingto the atmosphere eat generating parts which do not make noise.

Further objects and advantages of the present invention will be apparentfrom the 8 following description, reference being had to theaccompanying drawing, wherein a preferred form of the present inventionisclear- 1y shown.

In the drawing:

Fig. 1 is a horizontal section of a refrigerating apparatus constructedin accordance with the invention; A

Fig. 2 is a vertical section of the apparatus shown in Fig. 1; and IFig. 3 is a vertical section showing the compressor cooling device.

Referring to the drawing 10 designates any suitable base upon which ismounted a compressor 11 and a motor 12 which drives the compressorthrough a belt 13 and pulley wheels 14 and 15.- Connected to thecompressor is a condenser 18 which receives compressed gaseousrefrigerant from the compressor, cools and liquefies the refrigerant anddischarges the refrigerant to a receiver or reservoir 19. If desired,for thesake of convenience the receiver may be mounted on a pair ofbrackets 20 supported in the base 10. The brackets 20 also support ahousing 22 containing a switch for controlling the to motor. Sinceit isthe motor, compressor and switch which make noise in operation,I-propose to avoid annoyance by preventing such noise from transmittingfrom the apparatus itself. This may be accomplished by .completelyinclosing the nois parts of the apparatus in a housing w ich preventsthe transmission of sound from the apparatus to distant points. As shownin the drawing this housing may include a 25 upon which 7 the apparatusis supported, and a housing proper consistingof side walls 26 and acover 27. The base and housing may be made of an suitable material,.preferably some material "which absorbs sound waves and prevents thetransmission of sound through the housing.

Since the motor, compressor and condenser all generate heat during 0ration and since this heat must be remove I provide means so fordissipating to the outside atmosphere the heat generated. Since thecondenser does not make noise this may be placed outside of the housingwhere it is cooled'by contact with the atmosphere, which cooling may beenhanced 86 by ci'rculatingair over the condenser in any desired manner.

Heat conducting members 30 are passed through one of the walls 26 of thehousing. 7

, The inside ends of the heat conductors are in 90 the path of aircirculated by the fan and the outside ends of the heat conductorsdissi-- pate the heat to the atmosphere.

In order toincrease the" heat conducting capacity of the members so theyare prefer- 96 ably formed as closed chambers containing a volatileliquid such as diethyl ether, pentane, or isopentane. The liquid runs tothe lower end of the tubes where it absorbs heat from the air circulatedby the fans and is evapo-- rated. The vapor rises in the" tubes to thecooled ends outside of the housing. The vapor is condensed outside ofthe housing by the atmospheric temperature and the condensed liquidflows back into the lower end of the tubes. Thus as long as heat isapplied to the lower ends the liquid circulates and removes heat fromthe housing.

This arrangement is particularly advantageous in providing means forcooling the comressor and motor directly. A tube 31 has its lower andthermally attached to some part of the compressor to cooled, for exampleto the valve plate 82 ordinarily provided in com ressors for carryingthe discharge valves.

Pre erably a hollow chamber 37 is provided in the valve plate 32 in anysuitable manner and the tube or tubes 31 communicate with this chamber.This arrangement is shown in go the fragmentary vertical section view ofthe upper part of the compressor, Fig. 3. One manner of cooling themotor is to wrap a hollow jacket 38 about the field frame and connect itwith a tube 39. It is of course to an be understood that the chamber 37and jacket 38 contain a-quantity of'volatil'e liquid and like the tubes30, the tubes 31 and 39 conduct vaporto the-exterior of the housingwhere it condenses and returns to the chamber and 80 jacket. It is to beunderstood that other porconductin without dlsturbing the relation ofthe heat tions within the housing may be cooled in the same manner asshown with regard to the compressor and motor and that the condensingportionexterior 'of the housing may be readily increased if desired byincreasing the volume of the condensing tubes outside the housing andfins 40 may be added.

In order to provide for the removing of the housing, the cover 27 ismade removable from the side walls 26 and the tube '31 is passed througha slot 34 in the upper edge of the heat wall. To remove the housingtransmitting members the cover is first reinoved, after which the tubes31 and. 39 can be bent upwardl through slots formed in the side wall. Ater'that is done, the wall 26 can be removed. Preferably the housing ishermetically sealed to prevent noises created therein from beingtransmitted to the exterior. Therefore, the slots-in the wall 26 may besuitablyclosed as for example by rubber grommets 42 each having a groovewhich snugly embraces the opposite sides of the housing wall and eachhaving an opening for. receiving the tube. The joint of the walls suc assolder.

While the form of embodiment of the invention as herein disclosedconstitutes a pre- 'ferred form, it is to be understood that otherforms-mi ht be adopted, all coming within the scope of the claims whichfollow.

What is claimed is as follows:

1. Refrigerating apparatus comprising in combination a com ressor, meansfor driving the compressor, a ousin completely inclosing the compressorand riving means, and heat conducting members extending through thehousing for transmitting to the outsi e atmosphere heatgenerated withinthe housing, and means for circulating the air confined within thehousing over said heat conducting members.

--2. Refrigerating apparatus comprisin in combination a compressor,means for riving the compressor, a housing completely 1nclosing thecompressor and driving means, and wheat 'conductin members extendingthrou h the housing %or transmitting to the outsi e atmosphere heatgenerated within the housing, one of said members being thermallyconnected to the compressor and means for circulating the air confinedwithin the housing over said heat conducting member.

3. Refrigerating apparatus comprising in combination a compressor, meansfor driving the compressor,--a housing completely inclosing thecompressor and driving means, and heat conductin members extending throuh-"the housing for transmitting to the outside atmosphere heat generatedwithin the housing, said heat conducting members including closedcontainers for volatile liquid, and means for circulating airconfinedwithin the housing over said heat conducting members.

4. Refrigerating apparatus comprising in combination a compressor, meansfor driving the compressor, a housing completely inclosing thecompressor and driving means, and heat conducting members extendingthrou h the housing for transmitting to the outsitfe atmosphere heatenerated within the housing, said heat con ucting members includingclosed elongated containers for volatile'liquid, the end of eachcontainer in the housing being lower than the end outside the housing,and means for circulating air confined within the housing over saidheat, conducting members.

5. Refrigerating apparatus comprising in combination a compressor, meansfor driving the compressor, a housing completely inclosing thecompressor and driving means,

and heat conducting members extending through the housingfortransmitting to the outside atmosphere heat generated within thehousing,said' heat conducting members ud n isl s d'. ch mbe s m nsmassen tile liquid, the end. of each chamher within. the housing beinglower than the end outside the housing, means for circulating the airconfined in the housing over the lower ends of the heat conductingmembers whereby the volatile liquid within the heat conducting memberswill be evaporated.

6. Refrigerating apparatus comprising in combination a compressor, meansfor driving the compressor, a housing completely inclosingthe compressorand driving means, and means for conducting to the atmosphere heatgenerated within the compressor including a container for volatileliquid thermally connected. to the compressor body,

means for conducting vapor evaporated within said container outside thehouslng, means for condensing said vapor outside the housing andreturning the liquid to the container.

7. Refrigerating apparatus comprising in combination a compressor, amotor for driving a compressor, a housing completely enclosing thecompressor and motor, and heat conducting members extending through thehousing for transmitting to the outside atmosphere heat generated withinthe housing, one of said members being thermally connected to the motor,and means for circu1ating the air confined within the housing over saidmembersa 4 8. Refrigerating apparatus comprising in combination acompressor, means for driving the compressor, said compressor having acooling chamber therein, a housing completely enclosing the compressorand driving means, and means for conducting through said housing anddissipating to the atmosphere heat generated by the compres sorincluding a volatile fluid in said cooling chamber and a tube extendingfrom said chamber through the housing for condensing the volatile fluidoutside the housing and returning the liquidto the chamber,

In testimony whereof I hereto aflix my signature.

- HARRY B, HULL.

